Silo-door.



1. R. FREEZE.

SILO DOOR.

APPLICATION FILED NOV. 21v 1916. v

Patented Oct. 23,1917.

2 SHEETSSHEET 2- Inventor Jab/7mm Iii fieeze Attorney JONATHAN B.-IREEZE, OF MIDDLETOWN, OHIO, ASSIGNOB, BY MESNE ASSIGNMENTS,

'l'0 IKE AMERICAN ROLLING MILL COMPANY, OF MIDDLE'IOWN, OHIO, A CORPORA-rroaw or care,

SEQ-DOOR.

' Patented Oct. 23, 11.917.

, Application filed Novemberm, 1816. Serial No. 18%,695.

To all whom it air/a3 v concern Be it known that I, J OHNATHAN R FPEEZE,a citizen of the United States, res1d1ng at Middletown, Butler county,Ohio, have mvented certain new and useful Improvements in Silo-Doors,'ofwhich the following is a specification.

ThlS improvement pertains to $11.0 doors and, while it is suitable for avariety of structures of various forms it has been devised with specialreference to the shells of Fig. 4 a similar vertical section of portionsof the structure in the plane of line b of Figs. 1 and 2: and

Fig. 5 a horizontal section of portions of the structure in the plane ofline 0 of Fig. 1.

A diversity of scales is employed in the drawings.

In the drawings 1,v illustrates a portion of the shell of a sheet metalsilo of circular plan:

2, the door-opening therein, illustrated as :being rectangular: v

3, horizontal bars of Z-shaped cross-section riveted to the shell, onebar at the upper margin and 'one at the lower margin of the dooropening,thesebars forming grooves at the top and bottom of. the dooropening, onegroove opening downwardly and the other groove opening upwardly, the

'width of the grooves tapering from one end of the doorway to the other:

4, Z-shaped bars riveted to the shell and forming prolongations at thewide ends of the grooves which have been referred to:

5, a Z-shaped bar riveted to the shell at that margin of thedoor-opening corresponding with the narrow ends of the grooves formed bythe bars 3, this vertlcal Z-bar forming a vertical groove at the end ofthe door-openmg:

6 a notch cut in the inwardly ro'ectin fia ige of the Z-bar' 5: p 1 g 7,the door, which is formed of sheet metal of a size to cover thedoor-opening and extend vertically from the floor of the-bottom grooveto the roofof the top groove, this door being curved to fit against theouter surface of the shell at the margins of the door-opening:

, srarns PA EW- m I 8, an outwardly projecting roll formed by I curlingthat one of the vertical edges of the door corresponding with the wideends of the horizontal grooves in which the door slides:

9, a similar roll formed at the opposite .side edge of the door:

10, ladder-rounds riveted to the outer face of the doorzand 11,channel-bars, with their channels fac-' ing outwardly, riveted to theouter surface of the door at its upper and lower edges,

- these bars being tapered to correspond with the taper of the groovesformed by the bars 3, and of such dimensions that when the door is slidshut they fill the grooves at the top and bottom of the doorwa Assumethe door to he slid i hlly open and to be supported by the ooves in bars4. The bars 4 thus prevent t e falling away of the door, and if there isno objection to the door becoming separated from the shell when the dooris open then the bars 4 need not be provided.

When the door is pushed to the left to the fully closed position, thechannel-bars have a wedging fit in the upper and lower grooves and causethe door against the shell.

The rolls 8 and 9 stiffen the vertical edges of the door and thevertical Z-bar 5 stifi'ens one of the vertical margins of the doorway,and, when the door is pushed to closed position, roll 9 becomes housedwithin vertical Z-bar 5 and premed to the shell.

to be tightly pressed.

- It is preferred that the door fit rather open.

In silos it is highly desirable to avoid interior projections and in thepresent case projections are avoided by countersinks at L'In a door, thecombination of a shell 'rovided with a rectangular door-opening,liorizontal bars secured to the shell in front of the upper and lowermargins of the dooropening, and forming Walls closer to the shell at oneend than at the other whereby the,

upper and lower margins of the door-opening become provided withtapering grooves facing toward each other, a door adapted to close theopening and having its horizontal edges slidable in said grooves, andtapering members provided at the horizontal margins of the door andadapted to tightly fill said grooves when the door is pushed to closedposition, substantially as set forth.

2. A structure as specified in claim 1 when the grooves are formed oftapering Z-shaped bars secured to the shell at the horizontalmargins ofthe door-opening, substantially as set forth.

3. A structure as specified in claim 2 in combination with Z-shaped barssecured to the shell and forming endwise prolongations of the grooves attheir wider ends beyond the side margin of the door-opening,substantially as set forth.

4. A structure as specified in claim 1 in combination with a roll formedat each verof the door, substantially as set forth.

6. A structure as specified in claim 1 in combination with a verticalmember carried by the shell at the closing margin of the door andforming an inwardly open groove, and a roll formed on the closingvertical edge of the door and having its ends engage said horizontalgrooves and adapted to enter the vertical groove, substantially assetforth.

7. A structure as specified in claim 6 when the outer wall of saidvertical groove is notched to permit access of a tool to the roll whenthe door is closed, substantially as set forth.

J OHNATHAN R. FREEZE.

Witnesses:

E. H; VVUERDEMAN, C. W. SQHUELLER.

